Boiler.



No. 873,094. PATENTED DEC. 10, 190?. W. G. ROSS.

BOILER.

APPLIUATION FILED NOV. 19. 1906.

3 SHEETSSHEI-1T 2.

O O O O 0 fl ge@g%ggg u Q 0 0 0 0 Q 0 0 0 0 o .w o o c cfi 00 O 0 o '0 QQOQOQ OOOOf No. 878,094. PATENTED DEC. 10', 190?. w. G. Ross. BOILER.

' APPLICATION FILED R0 19, 1906.

3 SHEETS-SHEET- a.

the front of the boiler,

UNITED STATES PATENT OFFICE.

WILLIAM G. ROSS, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO FRANK SUTHERLAND,

OF CHICAGO, ILLINOIS.

BOILER.

Specification of Letters Patent.

Patented Dec. 10, 1907.

Application filed November l9I 1906. Serial No. 344.115.

To all whom it may concern:

Be it known that I, WILLIAM G. Ross, a citizen of the United States of America, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Boiler or Water Heaters, of which the following is a specification.

The main object of this invention is to provide an eflicient and inexpensive form of water tube boiler or hot water heater. This object is accomplished by the device shown in the accompanying drawings, in which:

Figure 1 is a front elevation of a boiler or hot water heater constructed according to this invention. Fig. 2 is a vertical section of the same taken on a plane parallel with the plane of section being indicated at 22 in Figs. 3 and 5. Fig. 3 is an elevation of the tube sheet shown at the left of Fig. 2, the arrows on the line 3-3 of Fig. 2 indicating the direction from which Fig. 3 is viewed. Fig. 4 is an inside elevation of the casing or right of Fig. 2, the arrows on the line 44 of Fig. 2 indicating the direction from which said casing is viewed. Fig. 5 is a section on the line 55 of Fig. 2, showing the arrangement of the tubes in the background, but omitting other parts of the boiler setting. Fig. 6 is a detail view showing the method of guiding and shifting the flue cleaner. Fig. 7 is a front elevation of the flue cleaner. Fig. 8 is a detail view illustrating the usual expanding and beading of the tubes at their junction with the tube sheet. Fig. 9 shows a form of stay bolt which is suitable for staying tube sheets of this type of boiler.

The specific arrangement and location of the stay-bolts is omitted from Fig. 3 to avoid confusion of the drawing since the method of staying such surfaces is well known in the art.

In the construction shown in the drawings, the boiler is substantially rectangular in form, having a grate 1 and ashpit 2 in its lower part. The heating chamber of the boiler comprises a fire box 3 located immediately above the grate and a combustion chamber 4 directly above the fire box and forming a continuation thereof. The two opposite side walls of the heating chamber consist of tube sheets 5 and 6 between which extend a system of straight water tubes 8, 11 and 19 which are expanded and beaded at their ends head shown at the to form water-tight joints with the tube sheets, as illustrated in Fig. 8.

Outside of each of the tube sheets is a casing or head 9. These casings, together with the tubes, form a tortuous water passage. The casings are of suflicient height to extend across all of the tubes in each sheet and also to extend downward at each side of the fire box. The casings 9 and 10 are connected by a series of horizontal tubes 11 at the rear of the fire box. The interior of each of the casings is subdivided by a plurality of partitions 12, preferably integral with the casings, and forming separate compartments 13, each connecting two of the adjacent tubes 8.

The partitions in the casing 9 are staggered with respect to those in the casing 10 so that the water or steam must flow successively through all of the tubes 8. Each of the casings is formed with a flanged rim so as to be bolted directly against its respective tube sheet and form a Water-tight joint therewith by means of an interposed gasket.

The partitions 12 have their edges lying in the same plane so as to fit against the tube sheets. These edges are coated with a composition such as a mixture of red lead and rubber cement, to form a substantially water-tight oint with the tube sheet, allowing little or no water to leak from one com.- partment 13 to the next, thus insuring the desired circulation through the tubes. The area of each compartment 13 is at all points greater than that of the cross-section of the tubes which it connects so as to avoid choking of the circulation.

Water is supplied to the boiler by means of a feed pipe connected with the inlet 14 and passes from the compartment 15 to the compartment 16 through the row of tubes 11 at the rear of the fire box. The compartment 16 communicates with one of the tubes 8 as shown in Fig. 5 and the water is then directed successively through the system of tubes 8 by means of the partitions 12. The water is heated during its passage through the compartments 15 and 16 and through the tubes, and finally reaches the compartments 17 and 18 in the upper parts of the casings. These communicate with each other by a plurality of tubes 19 which are arranged close to the fire brick arch 25 at the top of the boiler for the purpose of still further heating the steam or water in the tubes by means of heat reflected from said arch. In

the device shown, the compartments 15 and 16 are headers connecting all of the adjacent ends of the tubes 11, while each of the compartments 13 connects only two of the pipes 8.

When the device is used as a hot water heater, the outlet 20 is connected directly to the water pipes, but when the device is used as a boiler, the outlet 20 is connected with the usual steam dome or receiver, which is omitted from the drawings.

The outer surfaces of the tubes 8 which are exposed to the flame and hot gases in the combustion chamber 4 are cleaned by means of a scraper plate 21 which embraces the series of tubes 8 and has an aperture fitting each tube. The plate 21 is loosely mounted upon guide rods 22 which support the plate and prevent its weight from gradually causing the tubes to sag as would be the case if the plate were supported directly by the heated tubes. A pair of rods 23 are secured to the plate 21 at opposite sides and extend through the front of the boiler setting, being provided with handles 24 by means of which the plate 21 may be drawn along the tubes for scraping off accumulations of soot.

The chimney flue 26 extends outward of the boiler setting at the rear and below the arch 25, permitting the arch to extend across the entire top of the boiler.

The tube sheets 5 and 6 are supported by stay-bolts 27 in the manner illustrated in Fig. 9. Said bolts extend between the tube sheet and the opposite wall of the casing and are arranged in the usual manner and sufhciently close to each other so as to prevent buckling of the tube sheet under the pressure of steam to which' it is subjected.

In operation, the water enters the inlet 14 and passes from the compartment 15 to the compartment 16 being partly heated by the fuel in the fire box. During the passage of the water through the system of tubes 8, it must pass successively through all the heated tubes. When the device is used as a. steam boiler, the water is changed to steam before it reaches the compartments 17 and 18 and during its continued passage through the heated tubes the steam is thoroughly dried and to some extent superheated in said compartments and in the pipes 19 before it passes through the outlet 20.

What I claim as my invention and desire to secure by Letters Patent is:

1. A boiler comprising a heating chamber having vertically disposed tube sheets at opposite sides thereof, a plurality of tubes ex tending transversely between said sheets, and a casing fitting against one of said tube sheets and having a plurality of horizontal partitions extending toward and abutting against the tube sheet and forming a substantially water-tight joint therewith, and a plurality of vertically disposed partitions connecting adjacent horizontal partitions, said 'artitions being arranged to form a plura ity of pockets each connecting an adjacent pair of tubes, a second casing abutting against the other tube sheet and having a corresponding system of pockets, all arranged to cause water or steam to'follow a tortuous path upwardly through said system of tubes.

2. A boiler or water heater comprising a fire-box and a heating chamber extending upwardly therefrom, vertically disposed tube-sheets on opposite sides of said fire-box and heating chamber, a plurality of tubes extending between and through said sheets and having water-tight connection there'- with, a row of said tubes being locatedbehind the firebox, a casing mounted outside of each of said sheets, each of said casings forming a water-chamber extending along the side of the fire-box over the ends of said row of tubes and communicating directly with each of the tubes in said row, and each of said casings having above said chamber a plurality of pockets each connecting adjacent pairs of the tubes above said row, all of said pockets being arranged to cause the water to follow a tortuous upward path throughout the system of tubes above said row, said chambers being in communication with said pockets only through said system of tubes, and one of said chambers and said row of tubes communicating with said system only through the other of said chambers.

Signed at Chicago this 17th day of November 1906.

WILLIAM Gr. ROSS.

Witnesses:

WM. R. RUMMLER, E. A. RUMMLER. 

